32
SUPPLY
230VAC
BOILER
B1 B2
X-RELAY
SEC. PUMP
230VAC
L
L
N
N
C1 C2
UFH PUMP
UFH
contRol SYStEM SEcond FIx
ElEctRIcAl connEctIon
5.0
5.2
24. UFH pump output on BA Master Controller
5.2.2 Pump Outputs - UFH Pump
The master has an output for the underfl oor circulating pump (secondary
pump). The output will be energised with a delay of 180 sec after the
demand from the room sensor. The delay is to allow time for the thermal
actuator to open.
The 230v AC pump can be connected directly to terminals L and N under
the heading “Sec. UFH Pump”. Connect the pump E (Earth) terminal to E
(earth) on the master. The maximum pump load must not exceed 4 amps,
230v at start up. There is an overrun period of 1 minute after the demand
for heat from the room sensor disappears.
Delay times: Secondary UHF pump 3 min.
X-output: (confi gured as main pump) 3 min 10 sec.
X relay Output
BA controller has a relay which can be utilized for a number of different
purposes. The relay is a volt free output and is positioned on the PCB
as shown on the drawing. The function of the relay is determined by the
setting of the DIP-switches. The functions that the relay can perform, and
the appropriate DIP-switch settings, are as follows:
To control
DIP - 5
DIP - 6
DIP switches
(located on the master controller)
Description
Main Pump
Off
Off
ON
OFF
1 2 3 4 5 6 7 8
INST
ALL
MODE
BOILER
TEST
X - RELA
Y
DEHUMIDIFIER
DIP SWITCHES
RESER
VED
ON
OFF
1 2 3 4 5 6 7 8
INST
ALL
MODE
BOILER
TEST
SENSOR CHECK
INITIAL
HEA
T UP
SEQUENCE
X - RELA
Y
DEHUMIDIFIER
DIP SWITCHES
RESER
VED
DIP Switches on the master controller
DIP Switch 4 turned to 'ON' on the master controller to start
initial heat up sequence in accordance with BS EN 1264
SENSOR CHECK
INITIAL
HEA
T UP
SEQUENCE
X RELAY Output
ON
OFF
1 2 3 4 5 6 7 8
ON
OFF
1 2 3 4 5 6 7 8
ON
OFF
1 2 3 4 5 6 7 8
X - RELA
Y
X - RELA
Y
X - RELA
Y
Where a boiler primary pump is required to be switched on from the master,
the X relay output can be used for this purpose. This relay will be activated 10
seconds after the UFH circulating pump has started
High limit zone valve
On
Off
ON
OFF
1 2 3 4 5 6 7 8
INST
ALL
MODE
BOILER
TEST
X - RELA
Y
DEHUMIDIFIER
DIP SWITCHES
RESER
VED
ON
OFF
1 2 3 4 5 6 7 8
INST
ALL
MODE
BOILER
TEST
SENSOR CHECK
INITIAL
HEA
T UP
SEQUENCE
X - RELA
Y
DEHUMIDIFIER
DIP SWITCHES
RESER
VED
DIP Switches on the master controller
DIP Switch 4 turned to 'ON' on the master controller to start
initial heat up sequence in accordance with BS EN 1264
SENSOR CHECK
INITIAL
HEA
T UP
SEQUENCE
X RELAY Output
ON
OFF
1 2 3 4 5 6 7 8
ON
OFF
1 2 3 4 5 6 7 8
ON
OFF
1 2 3 4 5 6 7 8
X - RELA
Y
X - RELA
Y
X - RELA
Y
This function is used where an additional protection is required to prevent boiler
water entering the underfl oor system. When the system is off or when the
supply water exceeds 65°C. An additional fl ow water temperature sensor
(ETF-1899A) and a zone valve are connected (Fig. 14)
Cooling device or
module alternative
On
On
ON
OFF
1 2 3 4 5 6 7 8
INST
ALL
MODE
BOILER
TEST
X - RELA
Y
DEHUMIDIFIER
DIP SWITCHES
RESER
VED
ON
OFF
1 2 3 4 5 6 7 8
INST
ALL
MODE
BOILER
TEST
SENSOR CHECK
INITIAL
HEA
T UP
SEQUENCE
X - RELA
Y
DEHUMIDIFIER
DIP SWITCHES
RESER
VED
DIP Switches on the master controller
DIP Switch 4 turned to 'ON' on the master controller to start
initial heat up sequence in accordance with BS EN 1264
SENSOR CHECK
INITIAL
HEA
T UP
SEQUENCE
X RELAY Output
ON
OFF
1 2 3 4 5 6 7 8
ON
OFF
1 2 3 4 5 6 7 8
ON
OFF
1 2 3 4 5 6 7 8
X - RELA
Y
X - RELA
Y
X - RELA
Y
The relay output can be used to provide a volt free signal to a heat pump or to a
K-MOD switching module where a chiller is utilized to provide the cooling water.
The relay output is always on in cooling mode and off in heating mode.
(Refer to Fig. 38a, see page 41)
